Coil winding machine



March'26, 1935. E. w. COLLINS 1,995,916

COIL WINDING MACHINE Filed Feb. 11, 1933 12 Shets-Shet 1 H" I I ZZZ 21.5- 157 v INVENTOR ATTORN EY E. W. COLLINS COIL WINDING MACHINE March 26, 1935.

Filed Feb. 11, 1933 12 Shelets-Sheet 2 March 26, 1935. E, COLLINS Q 9 ,916

I con. WINDING MAbHmE Filed Feb. 11,1953 l2 Sheets-Sheet 3 WW W A2; ATTORNEY/7 March 26, 1935. E. w; COLLINS COIL WINDING MACHINE Filed Feb. 11, 1933 12 Sheets-Sheet 4 INVENTQR 614M 6% M Q M di ATTQ RNEV E. w. COLLINS COIL WINDING MACHINE March 26, 1935.

Filed Feb. 11, 1933 12 Sheets-Shed 5' IIIIIIIIIIIIIIII/IIII u ////////v 111/ llllrl -INVENI 'OR gym/72% 5M BY 444.44 9%, 5 ATTORNEY;

March 26,1935. E. w. COLLINS COIL WINDING MACHINE Filed Feb. 11, 1933 12 Sheets-Sheet 6 INVENOR ATTORN EYI March 26, 1935.

' E. w. COLLINS COIL WINDING MACHINE I 12 Sheets-Sheet 7 Filed Feb. ll, 1933 I I A INVENTOR fM/ZKMW .BY ww ufi/ ATTORNEY! March 26, 1935. E.\W. COLLINS GOILJWINDING MACHINE Filed Feb. 11, 1953 12 Sheets-Sheet 8 INVENTOR BY WW-,1 ,{JATTORNEY/ March 26, 1935. E. w. COLLINS 1,995,916

COIL WINDING MACHINE Filed Feb. 11, 1933 12 Sheets-Sheet 9 INVENT R- ATTORNEY! March 26,1935. E. w. COLLINS 1,995,91

COIL WINDING MACHINE v Filed Feb. 11, 19:53 v 12'slvaets-sheet 10 llllIlIlllllnlllllll I INVENTOR ATTORNEY/4 Mmh 26, 1935. v E; w, LLINS 1,995,916

' c011. WINDING MACHINE Filed Feb.. 11,-1953 12 sheets-sheet 11 7IAIIIIIIIIIIIIIIIII-III v A----.I I.IIIIIIIIIIIIIInn March 26, 1935.

& E]

E. W. COLLINS COIL WINDING MACHINE Filed Feb. 11, 1953 12 Shets-Sheet 12 ATTORNEY4 3:) and is a section on line 6-6 of Fig. 1.

Patented Mar. 26, 19 35 I UNITED si pxrias PATENT OFFICE I Con. WINDING MACHINE Edward w. Collins, Anderson, Ind., assignor, by

mesne assignments, to General Motors Corporation, Detroit, Mich., a corporation of Delaware Application Febguary 11, 1933, Serial No. 656.244

' 84 Claims.

This invention relates to coil winding machines and more particularly to a machine for winding coils such as disclosed in the patent of Jasper F. No. 1,926,331 issued September 12,

This application is a continuation in part of my copending application Serial No. 568,496, filed October 12, 1931.

. An object of the present invention is to provide a machine which operates rapidly and efliciently to wind coils such as those above mentioned. Still further objects'will readily occur to those skilled in the art upon reference to the follow-' ing description and the accompanying drawings in which:

Figs. 1 and 1a together form a of the machine.

Figs. 2 and 2a together form an elevation view top plan view of the machine.

Fig. 7 is a section on line 7-7 of Fig. 6. I Fig. 8 shows a stopping mechanism for the machine, and is a section taken on line 8-8v of Fig. 1a. I Fig. 9 is, a view similar to Fig. 58 showing. how ever, the stopping mechanism in another position. i

Fig. 10 is another view of theistopping mechanism looking in the" direction of arrow 10 in Fig. 9. I

'tlon on line 11-11 of Fig..1a.

Fig. 12 is a plan view 01. the winding head and- .the form, and is a view looking-in of arrow 12, Fig. 2a.

Fig. 13 shows'part'of thecutting blades, and is a view looking in the direction of arrow. 13, Fig. 12.-

the direction Fig. 14 is a partial plan viewiof, the cutting -tinguish them. The striped wire is designated Fig. 11 shows the winding head and is a secform a' substantial quadrilateral. In Figs. 23

Fig. 17 shows the wire shifting mechanism, and is viewed in the direction of arrow 1'7 in Fig. 16.

Fig. 18 shows the actuating mechanism for I the cutting blades and is taken on the line 18-18 ofFig. 2a. Figs. 19 and 20 are perspective views of the cutting blades.

Figs 21 and 22 are fragmentary perspective views of the machine.

Figs. 23 to inclusive, together illustrate in a diagrammatic manner the development of a coil on the winding form.

Fig. 46 is a diagrammatic view of the winding form, one side wall of the same being omitted for better illustration of the bottom of the winding groove.

Fig. 4'7 is a top view of a coil end receiving groove portion of the windingform and is viewed in the direction'of arrow 47.

Figs.48 to 55 inclusive, are fragmentary sectional views taken on the 48-48, 49-49, 50-50, 51-51, 52-52, 53-53; 54-54 and 55-55 jof Fig. 47.

Referring to the drawings and particularly to Figs. 4 to 5a inclusive, there is shown the coil which is v disclosed in the Cullin application referredto. In these figures there is disclosed a two-wire coil having a plurality of (seven) turns. One wire is striped and the other plain to disbyreference numeral 148 and its cross section is solid black. The plain wire is designated by numeral 147 and its cross-sectional view is crosshatched. The active coil sides and 131 are wrapped, while the coil end portions 132 and 133 are uncovered.

The coil is wound so that cross sections thereof through the active coil sides 130 and 131 are substantially in the form of elongated quadrilaterals and so that the long dimensions of said cross sections are substantially parallel and are inclined to the median plane of the cofl.

It necessarily follows that amachine for winding a coil ofthis description must include a rotatable winding form of peculiar shape and a. movable wire shifter which-cooperates with the form' in a particular manner-in order to produce the" coilof the Cullin application. Before describing the machine, (attention is directed to the disclosures in Figs. 23' to 45 inclusive, wherein in a diagrammatic' manner the development of the coil on'a winding form is illustrated. Asshown in Fig. 4a, the four coil sides are designated by numerals 130, 131, 132 and 133 which together :\'of coil end portion or coil side 132, Figs. 25, 29, 33, 5.37, 41, and. 45 illustrate the development of active coil side 131, and Figs. 26, 30, 34, 38 and 42 illustrate the development of coil end portion or coil side 133. It appears from Figs. 4, 4a, 5a and 24 that in the opposite coil sides 130 and-131 all wires run paralleL-whereas in thecoil sides 132 and 133 the wires cross each other. It is therefore apparent that due to thecrossing of the wires in coil sides 132 and 133, the other coil sides 130 and 131 have to be developed from opposite directions. This appears clearly from Figs. 27, 28, 29 and 30 in which the heavily marked wires together illustrate the winding of a single turn of the coil. The coil itself is wound from two continuous wires. It' will be notedin these figures that part 130a of the single turn' which is part of coil 130 is located on the right-hand side of a winding form 135, that the continuation of part 130a crosses over to the left hand side of said winding form f as part 132a of coil side 132, that the continuation of part 132a remains on the left-hand side of said winding form as part 131a of coil side 131 and a that the continuation of part 131a crusses' over to the right-hand side of said winding form as part 133a of coil'side 133. In comparing the successive Figures 27, 31, 35, 39 and 43, it appears that the coil side 130 is developed from the righthand side of winding form 135 and in comparing the successive Figs. 25; 29, 33, 3'1, 41 and.45 it appears that Icoil side 131 is developed from the left hand side of said winding form. In order to assure a snug engagement between the'succes sively deposited wires of coil side 130, a. surface 136 of the winding form is slightly tapered so that during winding the mere tension which is applied to the wires causes theme to yield against previously deposited wires of coil side 130.

Likewise a surface 137 of the winding form is slightly tapered so thatthe wires of coil side 131 are yielded against each other, respectively against the left hand side of winding form 135 as.

viewed in'these figures. The wires under tension which are crossing from one side of the winding form to the other side thereof naturally have a tendency to loosen the snug engagement between the wires of coil sides 130 and 131, in spite of the provision of the tapered form surfaces-136 and .137 whose tapers areshown exaggerated in the diagrammaticTillustrationcf Figs. 23 and 24. In

order to counteract such tendency'of the crossing wires, surfaces 139 and 140 of the winding form-135 are so tapered that the wires 132:: which connect'wires a and 131a are yielded in the same direction as wires 130a and 1310 for some distance from the intersections of wires 1320 with wires 130 and 1310. as appears clearly from.

Figures 27, 28 and 29; Likewise surfaces 138 and 141 of the winding form are so tapered that the wires-133a which connect wires 131a and 13Gb are yielded in the same direction as wires 131a and 130b'as appe rs clearly frcm,Figures 29, 30

and 31. It is therefore apparent that all the men tioned tapered surfaces of the winding form.co-

operate to produce a compact coil.

Having realized that due to the crossing wires in coil sides 132 and 133 it is necessary to develop the other coilsides 130 and 131 from opposite directions, it then follows that in order tohave the start and the end. leads of a coil emerging from the active coil sides 130 and 133 and in the vsame direction they would necessarily belocated in the same end plane of a coil. In order tolocate the start leads in one end-plane and the end is in the other end plane of a coil, one of the le is deposited in an end plane of the coil which is opposite to that from which that active coil side is developed from which said one of the leads end leads 131!) are located adjacent form surface 144 as appears from Fig. 45.

The surfaces 145 and 146 of winding form are curved so as to give .the crossing coil sides 132 and 133 a desired shape. The closest distance between these surfaces which is at the median crossing points of the wires of these coil sides is twice the thickness of a wire. This appears obvious from Fig. 4a where the median crossing points of coil sides 132 and 133 are shown in section.

There will now follow a brief description of the operations performed by the machine in order to produce a coil. Form wound coils of the kind shown in Fig.4 are wound on the revolving winding form 135 which has laterally displaced outwardly projecting portions, disposed in a plane perpendicular to the axis of rotation of the form, to provide wire holding means. In winding a coil, leading ends of the wires, as they come from the feed spools, from which the coil is wound, are hooked or anchored to an end of the wire holding portion. The form is then rotated and the wires are shifted laterally in a certain orderto be described later. A suitable number of turnsis given the form and on the last turn, the end wires are displaced, to bereturned to the wire holding portion,=where they are cut to free the trailing ends of the coil. Before the cutting'action takes place, however, the wires must be clamped to the winding form and more particularly, between the knife and the spools so as to provide anchors for the leading ends of the next coil to be wound. In the disclosed ma-. chine, the anchors are behtso as to be hooked in the wire holding portion and then are cut of! from the completed coil leading ends, while anchors for the next coil. are being formed and bent.

Acccrdinglmtwocuts are made in each cutting.

action, one, to cut the completed coil trailing ends from the anchors of the next coil, and the other, to cut the anchors-off the leading ends of' the completed, coil. 3 These cuts are performed automatically in-the machine by means of parallel blades m the wire holding portion which moveautomatically in parallel planes transverse to the to be cut. The blade whose cutting edge cuts of! the anchors of the leading ends of the completed coil, a bending edge which moves in the same-plane transverse'to the wires.

.as the cutting edge. part of the blade.

namely; the bending edge, bends the wiresito 7 form anchors forfthe next coil to be wound. The anchor cutting edge and the anchor bending vedge are relatively displaced, however, in that plane, with the cutting edge below the bending edge, so as to'move in different paths, with the anchors to be cut'ofl below the wires to be bent into anchors. Accordingly, insurance is given against the possibility of the anchor cutting edge traversing and "cutting the leading ends of the wires of the next-to-be-wound-coil, which latter are, at that time, being traversed by the anchor bending blade, thereby to be bent into anchors. In effecting this insurance, there has been provided means to move down the anchors after they are formed, and before the coil is completely wound, so as to be in the path of.

movement of the anchor cutting edge and so as to be below and out of the path ofmovement of the anchor bending-edge. Further, means are also provided to insurethe positioning of the trailing ends of the wound coil above the anchors of the same coil. These trailing ends, being above the anchors, are in the path of movement of the anchor bending edge, but are above and out of the path of movement of the anchor cutting edge.

The winding form 135 of the machine includes two major parts, one of which is laterally shiftable to and from the other. The relatively stationary part, hereafter called the head, is disposed on the end of a rotatable shaft and has a face perpendicular to the axis of rotation of the shaft, and against which face may be clutched or pressed a face of a shiftablc part, hereafter called the form. .The cooperating faces I have dovetailing and clutching portions for insuring their proper alignment and for relatively spacing the faces to provide a groove in which the coil may be wound. The form is disposed on the end of an axially shiftable shaft, hereafter called the tail shaft, loosely mounted, so. as to permit itself and the form to be rotated with the head when the latter and the'form are relatively clutched. The cooperating head and form which together constitute the winding form 135 provide the earlier explained winding groove. Projecting laterally from and forming an integral part of the head is the wire holding portions The latter has at its end two .re1ative1y transverse grooves, in one of which are laid the wires to be cut and bent,

. and in the other of which the blades move to traverse the wires. The wire receiving parts are more distanced from the axes of the shafts than are the shoulders of the grooves and accordingly, the coil is formed with leads 130c and 1310 projecting therefrom, these being what were referred to above as the'leading and trailing ends,

respectively, of the'coilbeing wound.

Construction of the machine Referring to Figs. 1 to 3 inclusive, and s to .22

inclusive, the head 200'is disposed on the end of 'which is rotated step by step from the main shaft and which is provided with cams, etc. for controlling the travel of the wires as they are being fed to the head. The counter shaft also serves automatically to control the clutch operating and locking means.

tall shaft 218, (see Figs. 1a and 20.) mounted so as to move axially toward and away from the head shaft. n the end thereof, nearer the head,

Aligned with the head shaft and with one end near the head, is a is the form 220, which may engage the head and rotate with it, in which case a coil may be wound into the winding groove formed by the cooperating head and form. The axial movement of the tail shaft is controlled and effected by the operator through a foot pedal 221. The shafts are mounted on a suitably supported bed 222, upon which may also be mounted a motor (not shown), operatively connected to the loose pulley by a belt or chain. Slidably mounted on head shaft 212 and keyed thereto is a clutch 224 whose face may be pressed against pulley 214 by a heavy coiled compression spring 213 disposed on the shaft between the collar 225 of clutch 224 and a stationary be ing 226 in which the head shaft is journalled. When the clutch is in, the head shaft is rotated andby means of ratchet wheels 2260 on counter shaft 216 and pawls 227 on head shaft 212, the former shaft is caused to rotate, step by step.

The pawls are held down by leaf springs 228 and the ratchets 2260. are removable and replace able by others if desired, to vary the intermittent rotation of the countershaft. As the counter shaft rotates, a lobe 230 of a cam 229, carried by said shaft, passes the end, of a horizontal rocker arm 232 thereby rotating the latter clockwise as viewed inFig. 1 on its vertical axis pivot 233, against the tendency of a torsion spring 234 (see Fig. 6), thereby forcing clutch 224 out of driving engagement with the driving pulley 214. Cam 229 is so designed and so applied that clutch 2241s disengaged from pulley 214 when a coil is completed. In order to prevent rotation of the head beyond a desired angular position after disengagement of the clutch due to the momentum of shaft 212 and head 200, means to pre vent such excess rotation are provided. Such means includes a cam 235, mounted on countershaft216 and having a lobe 236 which may actuate the end 237 of a shaft locking crank 238. The latter is journalled in a rubber cushioned bearing bracket 239, and has a hook portion 240 adapted to be disposed in a notch 241 in the' periphery of clutch collar 225. At the proper moment, the locking crank will'be moved by the camlobe 236 against the tendency of a tension spring 247a whereby its hook 240 enters notch 241 of the rotatingclutch collar 225- and stops rotation of clutch 224 and consequently of the head shaft.

When the head-has been stopped in proper angular position, the operator depresses foot pedal 221 which is connected to a link 242 by means of a a bar 243 and another link 243a, thereby to move downwardly, link242 whose upper end is connected to a bell crank 244 which is yoked at 245 to a control cone 246, moving the latter to the right (Fig. 2a). Such movement of the control cone causes .the bell crank shaped cutting blades 247 to rotate clockwise on their pivots 248 in head 200, and these blades traverse the wires to cut and bend them, in a manner to be described. The depressing of foot pedal 221 also results in downward movement of a link 249, which is also pivotally connected to bar 243 thereby actuating ,the toggle joint formedby links 250 whereby tail shaft 218 is moved toward the right (Fig. 2a) thus drawing the form 'away from the head in order to free the completely wound and clipped coil, which may then be removed by the operator. When the operator releases the foot pedal, a coil spring 251 which is attached with one end to the bed 222 and with the other end to bar 243 adjacent link 249 pulls bar 243 upwardly thereby causing the 'tail shaft -218 to be moved toward the head shaft 212 to clutch the form to the head and the bell crank 244 to be returned from the position shown in Fig. 8 to that shown in Figs. 2a and 9. As clearly shown in Fig. 2a, the pivot connection between link 243a and bar 243 is closer to link 242 than to link 249.. Therefore. upon depressing of foot pedal 221 link 242 will be first moved downwardly until the cone 246 has actuated the cutting blades 247 which then prevent "any further downward movement of link 242, and then link 249 will be moveddownwardly against the tendency of spring 251 whereby the form is withdrawn from the head. Upon release of the foot pedal by the operator, the spring 251, due to its closer location to link 249 urges the latter upwardly until the form is again in operative engagement with the head and thereupon 'the spring 251 will rotate bar 243 clockwise (see Fig. 2a) about the nowstationary pivot point between bar 243 and link 249 and cause bell crank 244 to be returned into the position shown in Fig. 2a.

When the yoked end of hell crank 244 returns to its original position, Fig. 2a, a spring depressed wedge-end starting cam 251a (Figs. 8, 9 and 10) carried thereby; slides on an anti-rfriction roller 252a of a stop rod 252 underneath a clevis 2 53 which is secured to the countershaft 216, thereby rotating the latter sufliciently to move lobes 230' and 236 of cams 229 and 235, respectively, from the clutch control rocker arm 232 and from the shaft locking crank 238, respectively. These parts then release the clutch and permit the heavy coil spring 213 to expand and to clutch the head shaft to the loose pulley once more, for rotation of the shafts and the head. It will be noticed in Fig. 7 that upon rotation of shaft 216 in the direction of arrow 70 as caused by starting cam 2510, cam

lobe 236 will move out of engagement with the shaft locking crank 238 before cam lobe 230 moves out of engagement with clutch rocker arm 232. In this manner it is assured that the clutch will not be in driving engagement with the driving pulley 214 before said clutch isfree to rotate.

From the foregoing, it will be understood that" immediately .upon release of foot pressure by the operator, the winding form parts come together and rotate, continuing so to do, without further attentionupon the part of-the operator, until the coil is completely wound, at which time the winding head will have assumed its rest position, and will have stopped. Then the operator will depress the foot pedal to cut of! and free the completed coil, without danger of the head starting to rotate, the shaft being locked until the foot pedal pressure is released once more.

The head 200 in general, is elongated and when in itsrest position, is disposed with its long dimension vertical (see Figs.- 18 and 21). On one face, it is cut away to provide a seat into which may be disposed ands'ecurely held an insert 260 removed and replaced by another, if desired, and

the inserts may be removed and replaced on the head.

The insert is provided with proiectins portions 261 which engage-similar portions 262 on the form 220 to create a windinggroove as explained with reference to Figs. 23 to 45 inclusive, in which a wire or wires may be wound. The' projecting portions 261 and 262 when in engagement with each other form a driving connection between the headandtheform.

The head. 200 is provided with two relatively transverse intersecting slots 265 and 266'. The slot 265 which is parallel to the axisof the head shaft, is considerably deeper and wider than the slot 266, and receivesthe blades 247 which are pivoted to the head by a pm 248. The slot 266 which is perpendicular to the plane of movement of the blades 247, is shallow and very narrow, and receives the wires to be traversed and anchored by the blades. The walls of slot 265 are cutting blade and accordingly has nothing more than a cutting edge 271.- The blade moreremote from the operator, and nearer the spools from which wires are fed, hastwo edges 272 and 273,

one above the other, they being separated by atooth' 274. The edge 272' is dull, being only a bending edge, while the one at 273, being for cutting, is very sharp.

In back of the head, near the end of the countershaft 216 is a wire shifter (Figs. 1a, 16, 17 and 21) comprising a bell crank 276 pivotally mounted at 277 to bed 222 and having a freely rotating wheel 278 over which the wires pass on their way from the spools to the winding form. an antifriction roller carried by bell crank 276 is urged by a spring urged plunger 279 into engagement with a disc cam 280 which is attached to countershaft 216 and actuates said wire shifting. wheel 278 in such manner that the latter properly guides the wires into the winding groove.

when a coil is to be wound, the leading ends of the wires, as they come from the spools are disposed in the slot 266 oi the head 200. e blades 247 at this time, are in the dot-and-d h position of Fig. 13, with slot 266 clear except for blade tooth 274 partly traversing the slotso that the wires rest on tooth 274, however, there is enough clearance between said tooth 274 and the corner 500 (see Fig; 14) to permit anchors to move underneath blade tooth 274. The foot pedaliis depressed and the blades-move from the dot-and-dash position in mill: to the run line position thereof, whereby bending edge 272 bends the leading ends-into hooks or anchors, these being clamped in a cutaway portion of therear blade (see F18: 12)-betweenthis blade and the rear plate 267. 'Ihe-head'starts to rotate, and the ends 270 of the blades are engaged by'the inside surface'282 of a stationary cam 283 (Fig. 18) which forces the blades back into. the dot-. and-dash position of Fig. 13,v The bending edge 272 which had been engaging-the anchors, now

frees them, and the tension. of the spools on the wires pulls the anchors onuie way down into the slot 266, below blade tooth 274, which is -once' more partly crossing slot 266, above the anchors. The winding parts rotate, and when the last turn is finished, the wires are shifted in a manner to be described later by wheel 278 into the wire slot 266, there resting on tooth 274 in 'the slot.

The operator now clips a side of the wound coil in a spring clip 234 (Fig; 12) disposing the latter in notches 285 in the edges of the head and form. While soholding the coil, the operator depresses pedal 221, which action causes control cone 246 to push blades 247 into the head. Edge 271 of the forward blade will cut the wires to sever the trailing ends from the wires coming from the spool. Edge 273 will cut the anchor ends off the leading ends of the coil, and edge 272 will bend the leading ends of the wires of the next coil to be wound into anchors, as before. At the same'time, form 220 is drawn back and the coil is free to be removed from the machine. Releasing of the pedal starts a new winding operation. Due to the fact that the cutting edge 273 is below the bending edge 272, and due to the fact that the anchors have been drawn down below the trailing ends of the wires, there is no danger that cutting off the anchors of the completed coil will also cut off the anchors of the wires coming from the spools.

In order that the machine may produce the coil of the Cullin application it is obvious that the cam 280 which controls the wire cutting mechanism and the wire, shifter must be constructed in the manner now to be described. Referring to Figs. 11, 12 and 21 to 45 inclusive, the start leads e, consisting of wires 147 and 148 are anchored in the manner previously explained. Upon starting of the. machine, cam

280 actuates-the wire shifter in such manner that the start leads 1300 of a coil to be wound are deposited in groove 142 of winding form during substantially the first quarter revolution of said winding form. Wire 147 is on top of wire 148. During the next quarter revolution of the V winding form wires 147 and 148 are deposited snug engagement with form surface 143. Wire 147 is still on top of wire 148, as shown in Fig. 25. During the next quarter revolution of thewinding form,.the wires are shifted from surface 143 over to surface 144, such crossing being partly controlled by the tapered form surface 141 and 138 and by the wire shifter. At the start of the crossing, the wire 147 is still on top of wire 148. As earlier stated, the wire shifter 278 shifts the wires twice during each revolution of the winding form, except the first time during the first revolution of the. winding form, at which time the wire shifter guides the wires properly into the continuing groovesl42 and 142a of the winding form. After such deposition .of these wires in form grooves 142 and 142a, the cam disc 280 whose true. contour is shown in Fig. 16 actuates the wire shifter regularly twice during each-rev olution of the winding form. One end ofform V groove- 142a merges into the groove 266 from which the anchored leads 130a extend. After the wires 147 and 148 move out of engagement with fdrm surface 145, wire 147 comes to lie side by side with wire 148. The distance between the centers of the two annular grooves of the wire shifter wheel 278 is approximately the distance A shown in Fig. 30; however, due to the fact that surface 136 of the winding form is tapered,

deposited coil turn. Again the tapered surface forms might be adopted, all coming within of the winding form urges wire 148 into snug engagement with wire 147 in spite of the greater distance between the centers of the shifter wheel grooves. During the next quarter revolution the wires remain in engagement with the lower wire 148 of the first deposited coil turn. During the following quarter revolution of the winding form, wires 147 and 148 for a short distance follow the previously deposited wires 147 and-148 until the wire shifter 278 directs the same across these previously deposited wires 147 and 143. From now on until the end of the winding operation, one wire will be deposited on the side of a previously deposited bottom wire and the other wire will be deposited on top of a previously deposited wire. The wire shifter wheel 278 does not inerfere with such wire deposition because, as already explained, the distance between the grooves of said wire shifter wheel is A. The figures following Fig. 30in successive order illustrate the further development of the coil. In maintaining the explained winding order throughout the remaining winding operation it is apparent from Figs. 23 to 45 inclusive, that the wires 147 and 148 are but for two instances located on the bottom and top, respectively, of coil side 130, and that the wires 147 and 148 are but for one instance on the top and bottom, respectively, of coil side 131. During the last quarter revolution of the winding form during a winding operation, the depression 300 of cam disc 280 causes the wire shifter to shift the trailing coil leads 1310,

into a notch 301 (see Fig. 22) of the winding head 200 which leads to the cutting groove 266. There will .be no detailed description of the con-'- tour of cam disc 280, since the cooperation between theintermittently rotated cam disc and the wire shifter has been sufficiently explained. After the machine comes to rest, the operator merely takes the wound coil from the winding form in the earlier explained manner. The end leads 130c-and 1310 which emerge from coil sides 130 and 131 willsubsequently be straightened so as to assume the position shown in Fig. 4 and the coil sides 130 and 131 will be wrapped by suit-' able strips of paper or likematerial, whereby the individual turns of the coil remain in proper relationship to each otherif not otherwise forced out of such relationship by intentionally applied external forces.

Fig. 46 shows clearly the shapeof the winding groove. It will be noticedv that the corners 501 to 504, inclusive, in which the bottoms of active coil side receiving and coil end receiving groove portions and certain of the two side walls of the winding groove meet, are deep corners of the windinggroove. This figure in a mostcompreslanting of the bottom of 'a coil end'receiving groove portion toward the above mentioned cor- I ners 501 and 504.

While the form of embodiment of the present invention as herein disclosed, constitutes a pre-:

ferred form, it is to be understood that other a the scope of the claims which follow.

1 What is claimedis as follows:

1.' In a coil winding machine, a winding form the leading end of a wound coil, and means toprevent'the start ,of the supply wire from being! 70 including means to .bend the start of a supply,"

disposed into' cooperative engagement with the anchor severing means and to retain the start of said supply wire in cooperative engagement with of the wound coil.

. 3. In-a coil winding machine, a form including meansto, sever the trailing end of a wound coil from a supply wire, means to bend the severed'end of the supply wire into an anchor hook which secures itself to the form, means to sever the anchor hook from the leading end means for preventing said severed end'-of the of the wound coil, and. means between the anchorbending means and the anchor severing means for preventing said severed end of the supply wire from being disposed into cooperative engagement with the anchor severing-means.

, 4. In a coil winding machine, a winding form including relatively movable means to sever the trailing end of a wound coil from a supply wire,-

relatively movable means to bend the severed end of the supply wire intoan anchor hook which secures itself to thehead, relative movable means to sever the anchor hook from the le din end of the wound coil, and means between the an-' chor bending means and. the anchor severing supply wire from being disposed into cooperative engagement with the anchor severing means, and

the anchor bending'means relatively moving outside of the path of relative movement of the anchor severing means. f

5. In a coil winding machine, a winding form including a plurality of means operable simultaneouslyto bend the start of a supply wire into an anchor hook which secures itself to the head and to sever the anchor hook from the leading end of a wound coil, and means to prevent the,

' start of the supply wire from being disposed into cooperative engagement with the anchor severing means I 6. In a'coil winding machine, a winding form providing a portion having two relatively transverse intersecting slots in'one of which the start of a supply wire is depositedyand anelem'ent pivotally mounted in the other slot'and operable 'to bend said start of the supply wire into saidother slotthereby anchoring the samejto the form.

'I. In acoil winding machine, a winding form.v

providing a portion having two relatively transverse intersecting'slots in'one of which the trailing end of a-wound coil is'deposite'd; and an ele-- ment pivotally mounted inithe other 'slot' and operable to sever the-*trailing end of the wound coil from a supply wire'and to bend the severed end of the supply wire into said other slot, thereby anchoring the same totheform.

8.Inacoilwindingm Qawindingform providing a portionhaving two relatively transverse intersecting slots in one of which the start of a supply wire is deposited;v and an element pivotally mounted in the other slot and operable to bend said start .of the-supply wire into said other slot therebyanchoring the same to the form, and'tosever the anchor hook fro the leading end of a wound coil. 9. In a coil winding machine, a winding form providinga portion having two relatively trans-:

verse 'interseetingsiots in one ofwhich the trailing end of a'wound coil isdeposited; and

slot thereby anchoring the same to the form. and to sever the anchor hookfrom the leading end of a wound coil.

10. In a coil winding machine, a winding form providing a winding groove, a portion having two relatively transverse intersecting slots in one of which the start of a supply wire is de posited, and a groove leading from the wire depositing slot to the winding groove for guiding the'starting end of a coil to be wound into said winding groove; and means in the other slot for bending the start of the supp y wire into said other slot thereby anchoring said, start of the supply wire to the winding form. 1

11. In a coil winding-machine, -a winding form providing a winding groove, a portion having two relatively transverse intersecting slots in .one

wound -coil from a supply wire, to bend the severed end of the supply wire into said other 5 of which the trailing end of a wound coil is de'- bending the severed end of the supply wire into said other slot thereby anchoring 'said severed end of the supply wire to the winding form. 12. In a coil winding machine, a winding form having a portion provided with two relatively I transverse intersecting slots; and an elementv pivotally mounted in one of said slots, said ele-" ment having a shearing edge cooperating witha shearing edge in which sidewalls of they slots meet for severing the trailing end of a wound coil from a supply and a bending edge for bending the severed end of the supply wire which extends across said one slot into the other slot, thereby anchoring the same to the winding form.

13. In a coil .winding'machine, a rotatable winding form having a portion provided with two relatively transverse intersecting slots; an element pivotally mounted, in one of said slots, a side surface ofthe element adjacent aside wall of said one slot terminating into a shearing edge cooperating with an edge in which two side walls of the slots meet for severing the trailing end of a wound coil from a supply wire, part of the opposite side surface of the element being spaced from the adjacent side wall ofsaid for bending the severed end-of the supply vwire againstsaid adjacent side wall of said one slot thereby anchoring the same to. the form, another part of the last mentioned side surface of the element closer to. the bottom of said onle slot terminating into a shearing edge cooperating with an edge in which said adjacent side wall of said one slot and a side wall or" the otheri slot meet for severing the bent-anchor end of a wound coil from the leading end thereof, and the bending edge of the element being separated from the anchorend shearing edge thereof by a tooth which in inoperative position of the element extends partially into said, other slot, permitting a bent anchor end to slide toward the bottom of said one slot into operative alignment with the anchor end shearing edge of the element; and means for guiding the trailing end of a wound coil into said other slot in such manner that said trailing end comes to rest against the tooth of the element before being severed from'the supply wire.

14. In a-coil winding machine, the combination of a rotatable winding form; a member cooperating with the form and carried thereby for .severing the trailing end of a coil from a supply wire, for forming the severedend of the supply wire, into a hook,-for anchoring the hookin the form and for severing the hook from the leading end of the coil; means for moving the member into operating position; and a. stationary cam for moving the member into inoperative position upon a partial revolution of the form.

15. In a coil winding machine the combination of a rotatable winding form providing a winding groove; a member cooperating with the form and carried thereby for'severing the trailing end of a coil from a supply wire, for securing the severed end of the supply wire to the form, and for releasing the leading end of the coil from the form; a movable wire guide; means actuated in response to rotation of the form for actuating the wire guide so as properly to guide the wire into the winding groove and the trailing end of the coil into operative engagement with the member; and means for actuating the member. 1

16. In a coil winding machine, the combination of a rotatable winding form providing a winding groove; a membercooperating with the formand carried thereby for severing the trailing end of ,a coil from a supply wire, for securing the severed end of the supply wire to the form, and for releasing. the leading end of the coil from the form; a movable wire guide; a rotatable shaft parallel to the axis of rotation of the form; means for in-. termittently rotatingthe shaft in response to rotation of the form in one direction; a cam on the shaft for causing the wire guide properly to guide the wire into the winding groove and the trailing end of a coil into operative engagement with the member; and means for actuating the member.

17. In a coil winding machine, the combination of a rotatable winding form; a member cooperating with the form and carried thereby for severing the trailing end of a coil from a supply wire, for securing the severed end of the supply wire to the form, and for releasing the leading end of the coilfrom the form; means actuatedin-response to rotation of the form for guiding the trailing end of the coil into cooperative position with said member; means for moving said member 1 into operating position; and means responsive to a partial revolution of the form for moving the member into inoperative position. n

18. In a coil winding machine, the combination of a. rotatable wi'ndingform; a power driven pulley loosely mounted on the winding form; a slidable'clutch on said windingform to clutch the latter to-the pulley; yieldingmeans tending to cause clutch engagement; a pivotally mounted clutch disengaging arm; an operable member cooperating withthe form and carried thereby for severing the trailing end of a coil from a supply wire, for securing the severed end of the supply wire to the form and for releasing the'leading end of the coil from the form; and means. actuated in response to-rotation of the form for actuating said arm and for guiding the trailing end of the coil into operative engagement with said member.

75 19. In a coil winding machine, the combination of a rotatable winding form; a power driven pulley loosely mounted on the winding form; a slidable clutch on said winding form to clutch the latter to the pulley; yielding means tending to cause clutch engagement; a pivotally mounted clutch disengaging arm; an operable member c'ooperating with the form and carried thereby for severing the trailing end of a coil from a supply wire, for securing the severed end of the supply wire to the form and for releasing the leading end of the coil from the form; a wire shifter; means actuated in response to'rotation of the form for causing the wire shifter properly to guide the wire to the form, and actuated in response to a certain number of completed revolutions of the form for causing the wire shifter to guide the trailing end of the coil into operative engagement with the member; and means actuated in response to rotation of the form for actuating the arm- 20.- In a coilwinding machine, the combination of a rotatable winding form; a power driven pulley looselymounted on the winding form; a slidable clutch on said winding form to clutch the latter to the pulley; yielding means tending to cause clutch engagement; apivotally mounted clutch disengaging arm; a member cooperating with the form and pivotally mounted thereon for severing the trailing end of a coil from a supply wire, for securing the severed end of the supply wire to the form and for releasing the leading end of the coil from the form; means for rotating the member into operative position; means actuated in response to rotation of the 'formfor actuating said arm and for guiding the trailing end of the coil into operative engagement .with said member; and means returning the member into inoperative position in response to a partial rotation of the form; means for actuating the arm; and means actuated in response to operation of the arm actuating means for actuating the locking means.

22. In a coil winding mmne, a rotatable winding form providing a winding groove; a loosely mounted pulley on the form; a slidable clutch on the form to clutch the latter to the pulley; yielding means tending to cause clutch engagement; -a pivotally mounted clutch disengaging arm; an

operable member cooperating with the form and carried thereby for severing the trailing end of a coil from a supply wire, for securing the severed end of the supply wire to'the form and for releasing the leading end of the coil from the form; locking means for preventing rotation of the form; and means actuated in response to rotation of the form for actuating said arm, for guiding the trailing end of the coil into operative engagement with said member, and for actuating said locking means.

'23. In a winding machine," a rotatable winding form providing a winding groove; a loosely mounted-pulley on the form; a slidable clutch on the form to clutch the latter to the pulley; yielding end of the supply wire to the form and for re-.

the member; means actuated in response .to a

leasing the leading end of the coil from the form;

locking. means for preventing rotation of the form; a wire shifter, means actuated in response to rotation of the form for causing the wire shifter properly to guide the wire into the winding groove and the trailing end of the cell into operative engagement with the member; and means actuated in response to a certain number of completed revolutions of the form for actuating the arm and the locking means. v 24. In a coil winding machine, a rotatable winding form providing a winding groove; a loosely mounted pulley on the form; a slidable clutch the form; locking-means for preventing rotation of the form; a wire shifter; means for moving the member into operative position; means actuated in response to rotation of the form for causing the wire shifter properly to guide the wire into'the winding groove and the trailing end of the coil into operative engagement with certain number of completed. revolutions of the form for actuating the arm and the locking means;

' and means returning, the member into inoperative position in response toa partial revolution of the form.

25. In a coil winding machine, the combination of a rotatable winding form-providing a winding groove; a member carried by the form and cooperating therewith for severing the trailing end of a coil from a supply wire, for securing the severed end of the supply wire to the form and for releasing theie'ading end .of the .coil from the form; a movablewire guide; means responsive to rotation of the form for actuating the wire guide seas properly to guide the wire into the winding groove'and to shift the trailing end of the coil into operative engagement with the member; and means including a manually operable element foractuating the member and for causing the wire 'guidelactuating means to-return the wire guide into position for guiding the wire into the winding groove.

26. In a coil winding machine the combinationof a rotatable winding form comprising a winding groove; a member carried by the form and cooperating therewith for severing the trailing end of a coil from'a supply wire, for securing the severed end of the supply wireto the form and tar releasing the leading end of the coil from the form; means for-driving the form; and means including a manually operableelement for acv 'tuating'the member and .for causing operation of the driving means.

27. Ina coil winding machine the combination of a rotatable winding formcomprising a winding groove; 'a member carried!!! the form and 00-- operating therewith for severing the trailing end of a coil from a supply wire, for securing thesevered end of the supply wire to the form and for releasing the leading end of the coil from the form; means for driving the form; means ineluding a manually operable element for actuating the member and for causing operation of the driving means; and' means actuated inresponse to rotation of the form for rendering the driving, means ineflfective.

28. In a coil-winding machine, the combination' of a rotatable winding form comprising a,

winding groove; a member carried. by the form and cooperating therewith for severing the trailing end of a coil from a supply wire, for securing the severed end of the supply wire to the form and for releasing the leading end vof the coil from the form; a movable wire guide; means actuated in response to'rotation ofthe form for actuating the .wire' guide so as properly to guide the wire into the winding groove and to shift the trailing end of the coil into operative engagement with the member; means for driving the form; and means including a manually operable element for actuatingthe member, for causing the wire guide actuating means to return the wire guide into position for guiding the wire into the winding groove and for causing operation of the 29. In a coil winding machine, the combina-'- tion of a rotatable winding form; a member carried by the form and cooperating therewith for severlng the trailing end of a coil from a supply wire, for securing the severed end of the supply wire tothe form and for releasing the leading end of the coil from the form; means forlocking the" form against rotation during'rest periods; and

means including a manually operable element for actuating the member and for releasing the locking means from the form.

30.- In acoil winding machine, the combination of a rotatable winding form; a member carried by the form and cooperating therewith for severing the trailing end of a coilfrom asupply wire, for securing the severed end of the supply wire to the form and for releasing the leading end of the coil from the form; means for driving the form; means for locking the form' against rotation during rest periods; .and means including'a manually-operable element for actuating the member, for releasing the locking -means from the form and for driving means."

31. In acoil winding machine, the combina-.

tion of a rotatable winding form; a member carried by the form and cooperating therewith for severing the trailing end of a coil from a supply wire, for securing the severedend of the supply wire to the form and for releasing the leading end of the coil from the form; means'for driving the form: means for locking the form against rotation during rest periods; means including a manually operable element for actuating the member, for releasingthe locking means from the form and for causing operation of the driving means; and means responsive to rotation of causing operation of the the for-in for rendering the driving means ineffectiverand the locking means effective.

82. In a coil winding machine, the combination of a rotatable winding form providing a winding groove; an operable member carried by the form. and cooperating therewith for severing the trailing end of a coil from a supply wire, for

securing the severed end of the supply wire to the form and for releasing the leadingend of the coil from-theform; a movable wire guide; means responsive to rotation of the form'fo'r actuating 'the wire guide so as properlytoguide the wire into the winding groove andto shift the trailing end ofthe coil into operative engagement with the member; means for driving the form; means 'for locking the form against rotation during rest H periods; and means including amanually operable element for causing the wire guide actuating 

